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https://github.com/c64scene-ar/llvm-6502.git
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b056aa798d
Move the specialized metadata nodes for the new debug info hierarchy
into place, finishing off PR22464. I've done bootstraps (and all that)
and I'm confident this commit is NFC as far as DWARF output is
concerned. Let me know if I'm wrong :).
The code changes are fairly mechanical:
- Bumped the "Debug Info Version".
- `DIBuilder` now creates the appropriate subclass of `MDNode`.
- Subclasses of DIDescriptor now expect to hold their "MD"
counterparts (e.g., `DIBasicType` expects `MDBasicType`).
- Deleted a ton of dead code in `AsmWriter.cpp` and `DebugInfo.cpp`
for printing comments.
- Big update to LangRef to describe the nodes in the new hierarchy.
Feel free to make it better.
Testcase changes are enormous. There's an accompanying clang commit on
its way.
If you have out-of-tree debug info testcases, I just broke your build.
- `upgrade-specialized-nodes.sh` is attached to PR22564. I used it to
update all the IR testcases.
- Unfortunately I failed to find way to script the updates to CHECK
lines, so I updated all of these by hand. This was fairly painful,
since the old CHECKs are difficult to reason about. That's one of
the benefits of the new hierarchy.
This work isn't quite finished, BTW. The `DIDescriptor` subclasses are
almost empty wrappers, but not quite: they still have loose casting
checks (see the `RETURN_FROM_RAW()` macro). Once they're completely
gutted, I'll rename the "MD" classes to "DI" and kill the wrappers. I
also expect to make a few schema changes now that it's easier to reason
about everything.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231082 91177308-0d34-0410-b5e6-96231b3b80d8
144 lines
7.4 KiB
LLVM
144 lines
7.4 KiB
LLVM
; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/branch.prof | opt -analyze -branch-prob | FileCheck %s
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; Original C++ code for this test case:
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;
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; #include <stdio.h>
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; #include <stdlib.h>
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;
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; int main(int argc, char *argv[]) {
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; if (argc < 2)
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; return 1;
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; double result;
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; int limit = atoi(argv[1]);
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; if (limit > 100) {
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; double s = 23.041968;
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; for (int u = 0; u < limit; u++) {
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; double x = s;
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; s = x + 3.049 + (double)u;
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; s -= s + 3.94 / x * 0.32;
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; }
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; result = s;
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; } else {
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; result = 0;
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; }
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; printf("result is %lf\n", result);
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; return 0;
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; }
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@.str = private unnamed_addr constant [15 x i8] c"result is %lf\0A\00", align 1
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; Function Attrs: nounwind uwtable
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define i32 @main(i32 %argc, i8** nocapture readonly %argv) #0 {
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; CHECK: Printing analysis 'Branch Probability Analysis' for function 'main':
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entry:
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tail call void @llvm.dbg.value(metadata i32 %argc, i64 0, metadata !13, metadata !{}), !dbg !27
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tail call void @llvm.dbg.value(metadata i8** %argv, i64 0, metadata !14, metadata !{}), !dbg !27
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%cmp = icmp slt i32 %argc, 2, !dbg !28
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br i1 %cmp, label %return, label %if.end, !dbg !28
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; CHECK: edge entry -> return probability is 1 / 2 = 50%
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; CHECK: edge entry -> if.end probability is 1 / 2 = 50%
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if.end: ; preds = %entry
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%arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1, !dbg !30
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%0 = load i8*, i8** %arrayidx, align 8, !dbg !30, !tbaa !31
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%call = tail call i32 @atoi(i8* %0) #4, !dbg !30
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tail call void @llvm.dbg.value(metadata i32 %call, i64 0, metadata !17, metadata !{}), !dbg !30
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%cmp1 = icmp sgt i32 %call, 100, !dbg !35
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br i1 %cmp1, label %for.body, label %if.end6, !dbg !35
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; CHECK: edge if.end -> for.body probability is 1 / 2 = 50%
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; CHECK: edge if.end -> if.end6 probability is 1 / 2 = 50%
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for.body: ; preds = %if.end, %for.body
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%u.016 = phi i32 [ %inc, %for.body ], [ 0, %if.end ]
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%s.015 = phi double [ %sub, %for.body ], [ 0x40370ABE6A337A81, %if.end ]
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%add = fadd double %s.015, 3.049000e+00, !dbg !36
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%conv = sitofp i32 %u.016 to double, !dbg !36
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%add4 = fadd double %add, %conv, !dbg !36
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tail call void @llvm.dbg.value(metadata double %add4, i64 0, metadata !18, metadata !{}), !dbg !36
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%div = fdiv double 3.940000e+00, %s.015, !dbg !37
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%mul = fmul double %div, 3.200000e-01, !dbg !37
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%add5 = fadd double %add4, %mul, !dbg !37
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%sub = fsub double %add4, %add5, !dbg !37
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tail call void @llvm.dbg.value(metadata double %sub, i64 0, metadata !18, metadata !{}), !dbg !37
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%inc = add nsw i32 %u.016, 1, !dbg !38
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tail call void @llvm.dbg.value(metadata i32 %inc, i64 0, metadata !21, metadata !{}), !dbg !38
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%exitcond = icmp eq i32 %inc, %call, !dbg !38
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br i1 %exitcond, label %if.end6, label %for.body, !dbg !38
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; CHECK: edge for.body -> if.end6 probability is 1 / 10227 = 0.00977804
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; CHECK: edge for.body -> for.body probability is 10226 / 10227 = 99.9902% [HOT edge]
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if.end6: ; preds = %for.body, %if.end
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%result.0 = phi double [ 0.000000e+00, %if.end ], [ %sub, %for.body ]
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%call7 = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([15 x i8]* @.str, i64 0, i64 0), double %result.0), !dbg !39
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br label %return, !dbg !40
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; CHECK: edge if.end6 -> return probability is 16 / 16 = 100% [HOT edge]
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return: ; preds = %entry, %if.end6
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%retval.0 = phi i32 [ 0, %if.end6 ], [ 1, %entry ]
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ret i32 %retval.0, !dbg !41
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}
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; Function Attrs: nounwind readonly
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declare i32 @atoi(i8* nocapture) #1
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; Function Attrs: nounwind
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declare i32 @printf(i8* nocapture readonly, ...) #2
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
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attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readonly "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #3 = { nounwind readnone }
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attributes #4 = { nounwind readonly }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!25, !42}
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!llvm.ident = !{!26}
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!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4 (trunk 192896) (llvm/trunk 192895)", isOptimized: true, emissionKind: 0, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !MDFile(filename: "branch.cc", directory: ".")
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!2 = !{i32 0}
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!3 = !{!4}
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!4 = !MDSubprogram(name: "main", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 4, file: !1, scope: !5, type: !6, function: i32 (i32, i8**)* @main, variables: !12)
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!5 = !MDFile(filename: "branch.cc", directory: ".")
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!6 = !MDSubroutineType(types: !7)
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!7 = !{!8, !8, !9}
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!8 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !10)
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!10 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !11)
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!11 = !MDBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!12 = !{!13, !14, !15, !17, !18, !21, !23}
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!13 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "argc", line: 4, arg: 1, scope: !4, file: !5, type: !8)
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!14 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "argv", line: 4, arg: 2, scope: !4, file: !5, type: !9)
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!15 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "result", line: 7, scope: !4, file: !5, type: !16)
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!16 = !MDBasicType(tag: DW_TAG_base_type, name: "double", size: 64, align: 64, encoding: DW_ATE_float)
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!17 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "limit", line: 8, scope: !4, file: !5, type: !8)
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!18 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "s", line: 10, scope: !19, file: !5, type: !16)
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!19 = distinct !MDLexicalBlock(line: 9, column: 0, file: !1, scope: !20)
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!20 = distinct !MDLexicalBlock(line: 9, column: 0, file: !1, scope: !4)
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!21 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "u", line: 11, scope: !22, file: !5, type: !8)
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!22 = distinct !MDLexicalBlock(line: 11, column: 0, file: !1, scope: !19)
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!23 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "x", line: 12, scope: !24, file: !5, type: !16)
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!24 = distinct !MDLexicalBlock(line: 11, column: 0, file: !1, scope: !22)
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!25 = !{i32 2, !"Dwarf Version", i32 4}
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!26 = !{!"clang version 3.4 (trunk 192896) (llvm/trunk 192895)"}
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!27 = !MDLocation(line: 4, scope: !4)
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!28 = !MDLocation(line: 5, scope: !29)
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!29 = distinct !MDLexicalBlock(line: 5, column: 0, file: !1, scope: !4)
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!30 = !MDLocation(line: 8, scope: !4)
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!31 = !{!32, !32, i64 0}
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!32 = !{!"any pointer", !33, i64 0}
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!33 = !{!"omnipotent char", !34, i64 0}
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!34 = !{!"Simple C/C++ TBAA"}
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!35 = !MDLocation(line: 9, scope: !20)
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!36 = !MDLocation(line: 13, scope: !24)
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!37 = !MDLocation(line: 14, scope: !24)
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!38 = !MDLocation(line: 11, scope: !22)
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!39 = !MDLocation(line: 20, scope: !4)
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!40 = !MDLocation(line: 21, scope: !4)
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!41 = !MDLocation(line: 22, scope: !4)
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!42 = !{i32 1, !"Debug Info Version", i32 3}
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